睾丸癌是年轻男性最常见的恶性肿瘤,占20～35岁白人全部癌肿的20％。何杰金氏病也好发于15～39岁年龄组。这两种癌肿的流行病学特征具有许多明显的炎似之处:白人都市人口的发生率均不断增长,最常见于欧洲,特别是丹麦;在美国境内发病率具有南北梯度,黑人和土著日本人发病率低,较高社会阶层和职业者比兰领工人更多发;均有肯定的家族史(主要决定年轻时的家庭生活,与此后 Testicular cancer is the most common malignancy in young men, accounting for 20% of all cancers in whites aged 20-35. Hodgkin’s disease also occurs in 15 to 39 age group. The epidemiological features of these two cancers have many obvious signs of inflammation: the incidence of white urban populations is constantly increasing, most commonly in Europe, particularly Denmark; and in the United States, the prevalence is north-south gradients, blacks and indigenous The incidence of Japanese is low, and the higher social strata and occupations are more frequent than those of Blue collar workers; both have affirmative family histories (mainly determining family life in young age, and thereafter